Transition Part: Synchronisation Lines (3-D-FFS)

3-D FFS > Via connection > Transit

The transition piece is derived from the two boundary curves, by connecting them with so-called "synchronisation lines". These synchronisation lines can, depending on the identified curves, either be determined automatically by HiCAD or manually by the user. The additional assignment of connection constraints provides numerous modelling options for transition piece generation: It will, for instance, be possible to create smooth connections of the created surfaces. If no connection constraints are assigned, the connection will be linear.

The synchronisation lines are determined via the appropriate field in the Connect curves dialogue window.

• Set synchronisation lines
• Correct synchronisation lines

Set synchronisation lines

Synchronisation lines can, depending on the identified curves, either be determined automatically by HiCAD or manually by the user.

• HiCAD automatism

If you want HiCAD to determine the synchronisation lines automatically, click the Complete button. The synchronisation lines will subsequently be shown as a "frame". You can start this automatism during any phase of the synchronisation line definition, even if you have already determined any synchronisation lines manually.

• Manual definition

If you want to determine the synchronisation lines manually, activate the Set option field. Then, move the cursor out of the input field and determine the start point and end point of the desired synchronisation line.

Please note the following:

• Start point and end point of a synchronisation line need to be located on the edges of the surfaces you want to connect. Besides the point optionI, the options M, D, O, QP are useful.
• The synchronisation lines may only touch on the boundary curves and must not intersect.
• The minimum number of synchronisation lines corresponds to the maximum number of edges of the two identified curves. If, for instance, one curve consist of 4 edges, and the other curve of 8 edges, at least 8 synchronisation lines are required!

The images below show a transition piece - without connection constraints - between the boundary curves of two solids.

Example 1: HiCAD automatism

Here all synchronisation lines were determined automatically by HiCAD.

Left: Parts to be connected, Middle: "Frame", Right: Transition piece

Example 2: Manually + HiCAD automatism

Here the synchronisation lines (1) and (2) have been set manually; after this, the HiCAD automatism was used.

Links: Parts to be connected, Middle: "Frame", Right: Transition piece

Please note:

During synchronisation line determination you can to activate a context menu with a right-click. The cursor needs to be located on the drawing surface, i.e. it must not be placed in the Connect surfaces dialogue.

The context menu contains the following options:

Correct synchronisation lines

You have the following options to correct the synchronisation lines of the frame:

• Activate the Delete option. Then identify the synchronisation line you want to delete in the drawing and redefine the line.
• Click the Delete all button if you want to delete the complete frame.

Transition Piece (3-D FFS) • Surface via Connection (3-D FFS) • Overview of Functions (3-D FFS)